* a device that responds to mechanical strain. with a small change in resistance. ... * device for determining the amount of strain (change in dimensions) when a stress is applied
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A stain gauge is a device that shows the strain of a structure or material where it is attached.
A strain gauge rosette is, by definition, an arrangement of two or more closely positioned gauge grids, separately oriented to measure the normal strains along different directions in the underlying surface of the test part. Rosettes are designed to perform a very practical and important function in experimental stress analysis.
strain has no unit
advantages of the strain rosette analysis
tension
No, it is fiction.